Oil filter and pump combination



J n 1949- c. P. MOLYNEUX OIL FILTER AND PUMP COMBINATION Filed June 2, 1948 IN VE N TOR Cecil i? J/ag'yzyrzar ATTORNEYS Patented June 21, 1949 UNITED STATES PATENT OFFICE 2,474,009 OIL FILTER AND PUMP COMBINATION Cecil Patrick Molyneux, Hampton Bays, N. Y., as-

signor to Filtors, Incorporated, Long Island City, N. Y., a corporation of New York Application June 2, 1948, Serial No. 30,649 6 Claims. (Cl. 103202) a unit, or of providing a filter which is adapted to be used in connection with a particular type of pump.

engine when the pump is operated. Such control is extremely difiicult lct lines of the filter communication with the outlet and inlet chambers, respectively, of the gear pump. In a known instance where a propoasl was made to mount a filter on a gear pump, even by an important automotive concern, it was not adopted in commercial practice.

Some automotive engines are provided with filters and some are not, but in most all cases with the combination of an oil filter with a pump of the eccentric or vane type. With such a pump the cover plate is removed and the filter attached positioned so that they open at the face of the pump so that each is alternately opened and closed to a controlled extent during the functioning of the pump.

In my pending application, Serial No. 15,545, filed March 18, 1948,

constituting an illustrative embodiment thereof.

In the drawings:

Fig. 1 is a perspective view partly in section, with parts broken away, of a combined filter and pump constructed and arranged in accordance with my invention.

Fig. 2 is a view of the inside face of the mechanism of the pump shown in Fig. 1 with the filter and integral mounting plate removed.

Fig. 3 is a. broken vertical cross-sectional view of the pump taken on the line 33 of Fig. 2.

Fig. 4 is a horizontal sectional view of the pump structure shown in Figs. 2 and 3, taken on the line 4-4 of Fig. 3.

Fig. 5 is a vertical sectional view through the pump structure shown in Figs. 2 to 4, taken on the line 55 of Fig. 4.

Referring to Fig. 1 of the drawings, the improved oil filter unit includes a substantially cylindrical shaped cast aluminum filter body Ill having an integral cast flange or mounting plate l2 and a pump body M to which the flange or plate I2 is secured by studs or bolts IS. The pump body l4 projects from and is an integral part of, or secured to, an engine body l8. The type of pump l4 shown in the drawings and secured to the engine body approximately in the is conventional with certain is secured to the face of the pump body l4 and made fluid-tight thereto by means of a gasket 20.

Under present circumstances, the automobiles of the type referred to are not provided with filters at the factory, and the face of the pump as illustrated, is covered over with a cover plate of the pump and which has an internal contour, 26, alternating with, or formed by, a corre ponding number are on one side of the elements 22 and 36 while of inwardly projecting arced segments 28. the ducts 54 and 56 port on the opposite side of The ring 22 cooperates with an inside member these elements.

36 having four symmetrical projecting lobes 32 While the cavities 38 and 46 are arranged to which approximately fit into the recesses 26, these deliver and receive oil, respectively, over the full lobes being connected by surfaces which approxirange of movement of the pumping members 22 mately fit the arced surfaces of the segments 28. and 36, the ports 55 and 51 of the ducts 54 and 56 The member 30 is mounted on a crank pin 34 at the face or the plate 12 cover a very restricted and driven by a shaft 36. The shaft 36 is driven portion of the face of the pump mechanism. The by the engine 18 in the usual manner, to move positions of these ports with respect to the pump the pin 34 eccentrically in the ring 22 and cause mechanism are indicated by the dotted circles in movement and rotation of the member 36 and Figs. 2 and 5. In these positions it will be noted the ring 22. At the same time, the lobes 32 that as the ring 22 rotates the segments will paralternately move into and out of the pockets 26. tially close the ports or the ducts 54 and 56, and Th arran m nt and operation f t P mp is that at other times the lobes or projections 32 such that as a lobe 32 moves out of a pocket 26, will completely close off these ports because the oil is drawn in, and as such a lobe moves ininside surface of the plate [2 bears directly wardly toward such cavity, the oil is driven out. against the surfaces of the ring 22 and of the Th perations occur regularly on pp Sides driven member 36. Ports 55 and 51 therefore ccof the pump. operate with the movable elements of the pump The normal oil inlet and outlet for the p mp to meter the oil to and from the filter as each of are provided in back of the mechanism shown in these ports is alternately opened and closed by the Fig. 2, as indicated at 38 and 46. As seen in Figs. pump rotor mechanism The filte therefore 4 and 5, the inlet and outlet comprise, respecceives and discharges oil in a quantity which is tively, the relatively long arc-shaped pockets 38 directly proportional to the speed of rotation or and 46 which are recessed in the back wall of the R. P. M. of the pump. ump body directly in back of the members 22 The ports 55 and 51 are in the face of the pump and 36. The recess or cavity 38 communicates opposite to the long recesses 38 and 46 and are with a. threaded inlet duct 42 for the delivery of not in index therewith. Since the ports 55 and oil through a pipe or duct, not shown, from the 51 are alternately closed and opened by the rotor body of oil in the crank case of the engine. The elements 22 and 36. they do not interfere with the oil delivered by the pump into the cavity or groove normal suction and pressure of the pump but act 46 is forced through a threaded outlet duct 44 only in a limited way to meter oil through the and distributed through ducts or pipes to the varifilter at a rate depending upon the speed of the ous bearings of the engine. All of the connecpump rotor and the positions of the ports.

tions to the ducts 42 and 44 are entirely inside the In working out the correct positions for the engkm ports 55 and 51 of the particular pump illustrated It will be noted from the position of the recesses and described, it was determined that the ports 38 and 46 in Fig. 2, that as the spaces open u on should be spaced apart approximately the width the left-hand side of the pump, between the memw of the narrowest dimension of the eccentrically bers 22 and 36, the oil will be drawn in, and that moving member 36. In this relationship it will be as these elements rotate to the right-hand side seen that since this member moves eccentrically of the pump, the o1 will be squeezed out into t respect o t e p that y will be covthe recess 46 and forced under the requisite presd a erab e part of the time by the body sure through the duct 44. 45 of this member. It was found by test that when The filter body 16 is provided with a standard e 55 n 51 a e Spaced as shown and defilter cartridge of more or less conventional type, Scnbed, that a sumcient p opo t on of the oil not shown, but which is mounted around a cend ed by the pump would e ed throu h tral tube 46 which carries the filtered oil from the the filter regardless of t Speed of the pump, filter cartridge. Cartridges of the type com- 50 and that at the Same time the rated p monly used have an external 0 forated so that oil is delivered entirely around the F The Ports and 51 may be positioned casing and fl w through the openings therein, in accordance with the above procedure to ohand through the filtering material provided in the tem the desired correlation between filter and cartridge then into the tube 46 which is slotted 55 P or perforate The body m is provided with a While in describing the invention in connection cover 48 held in place by a bolt 5" and a sealing with the illustrative embodiment reference has gasket 52. The bolt so is threaded into the upper t made a single type m end of the tube a so that the cover is tied down with a filter structure, it will be understood that tightly and the filter cartridge held in place. with Pumps having a Similar mechanism a vane type of rotor, it will be possible to so'locate on summed to the filter body through duct the ports 55 and 51 as to accomplish approxi- 54 which extends through the cast metal of the unit with one end opening, as shown, inside the gf i resuts descnbed.abve Th1s.1s tr mer the face of the plate wlth port It Wm therefore that the invention is not strictly limited be noted that the port 55 of the duct 54 opens to the arti um through the face of the plate l2 on the right side cable, i g flfi 3 figgf gii gf g fg g asing whichis sure of the pump would not be materially of the Pump opposlte the outlet cavity The which have characteristic inlet and outlet char n;

filtered oil is discharged from the filter 16 by a hers other Chan ges may be made in the strucduct Whlch extends through the cast metal of ture it,1-10'u t materially changing the a pli ation the filter body and opens into the lower portion features and j t of t t' ion, and such of the tube 46 and thiou h t face of the Plate changes are contemplated as coming within the I? by a port 51 On the lef S e of the p mp oppospirit and scope of the appended claims. site a portion of the oil inlet cavity 38. The pump What 1 l i as ew i inlet and outlet cavities or chambers 38 and 46 1, In a apparatus for pumping and filt i 6. In an apparatus for pumping and filtering oil including' an oil pump, and an 011 filter mounted covered and uncovered during the operation of the pump.

CECIL PATRICK MOLYNEUX.

No references cited. 

